Roue omnidirectionnelle : déplacement latéral sans rotation

An omni wheel has a ring of small rim rollers parallel to the wheel face (0°): the wheel rolls forward/back, while the free-spinning rollers allow lateral slide. With four wheels coordinated, the robot strafes, moves diagonally and spins in place.

Quel problème cela résout

A traditional differential chassis draws an arc when turning - in narrow aisles between racks, at elevator doors and before workstation docks it often cannot make it in one take and shuttles back and forth. An omni chassis never turns around: you point the direction, and the robot slides sideways into the elevator.

Typical scenarios: cleaning narrow lanes between rows of parking spots in underground garages, point-to-point delivery between 3C production cells, hospital corridors without waiting at doors.

Comment lire les spécifications clés

Roller orientation: omni rollers are parallel to the wheel face (0°); the 45° angled rollers of a Mecanum wheel are a different structure - do not mix them up.
Payload and grade: the Tbot-OW-3D omni chassis carries 100-500kg and climbs 30°; small roller contact patches handle curbs worse than rubber wheels.
Floor flatness: omni wheels are sensitive to joints, thresholds and speed bumps - they work best on smooth indoor concrete; outdoor paving should be checked first.
Speed: omnidirectional motion is synthesized from four wheel speeds, so real speed is generally lower than a pure differential chassis - do not expect fast driving under heavy load.

Idées reçues courantes

Misconception 1: omni wheel = Mecanum wheel. Omni rollers run parallel to the wheel; Mecanum rollers are angled at 45° - load capacity and calibration demands are entirely different.

Misconception 2: omni wheels go anywhere. The roller rim dislikes uneven floors - thresholds, tile joints and cables can jam or jolt it.

Misconception 3: omni motion = spinning in place. Strafing and diagonal movement are the real value of omni wheels; any chassis can spin.

Modèles recommandés

Tbot-OW-3D omni wheel chassis: 3D multi-line LiDAR navigation, 100-500kg payload, side-strafing through narrow aisles without turning; cleaning use cases see the Tbot-Clean line. Full parameters in the full spec table.

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